Improvement in slates



w. J. MONTGOMERY. SLATES.

No.177,539. Patented May16,1'876.

FIG. I.

A'I 'TEST: I

mvsm'on:

N- PUERS, PHDTO-LITMOGRAPNERI WASHINGTON. D C.

UNITED STATES PATENT OFFICE.

WILLIAM J. MONTGOMERY, OF ST. LOUIS, MISSOURI, ASSIGNOR OF,ONE-

HALF HIS RIGHT TO CHARLES H. STONE, OF SAME PLACE. I

IMPROVEMENT IN SLATES.

Specification forming part of Letters Patent No. 177,539, dated May 16, 1876 application filed April 7, 1876.

v To all whom it may coitcer-n:

Be it known that 1, WILLIAM J. MONT- GOMERY, of the city and county of St. Louis, and State of Missouri, have invented a certain new and useful Improvement in School- Slates, of which the following is a full, clear,

' the'cover out of con tact with the face of the slate. The cover is reversible from side to side of the slate.

Figure 1 is a perspective view, showing the cover partly drawn out. Fig. 2 is a longitudinal section. Fig. 3 is a transverse section.

The slate-frame has a usual end bar, A, and side bars B B. O is a thin tie-bar, connecting together the ends I) b of the bars B B. The bars B B have, at theirinner edges, upon both sides of the slate, acute-angled grooves b b, which receive the similarly-shaped edges d d of the sliding cover D, said edges being made to slide in saidgrooves as the cover is forced in and out. d is the end bar of the coverslide, said bar being formed to lap around and embrace the tie-bar O, (as shown in Fig. 2,) when the cover is in position upon the slate. At the inner sides-of the guidegrooves I) 1), between said grooves and the slate E, are shoulders f, which prevent the cover coming in contact with the slate, and thus erasing characters marked thereon.

The cover can be applied to either side of the slate to protect it, the other side being exposed for present use.

Iclaim The combination of slate A B (J E, and reversible sliding cover D, substantially as set forth.

WILLIAM J. MONTGOMERY. Witnesses:

SAML. KNIGHT, R0131. BURNS. 

